Grooming techniques are used to remove contamination from soft and/or large angle radiation often stemming from background. Several algorithms have been proposed, the most widely used in heavy ion physics is Soft Drop [1]}, [2]}. According to this procedure the constituents of jets are first re-clustered with the Cambridge/Aachen algorithm. In an iterative procedure the last re-clustering step is undone to yield two sub-jets. The algorithm terminates when their momenta satisfy the relation
\(z_g = \frac{\min (p_{\perp ,1},p_{\perp ,2})}{p_{\perp ,1} + p_{\perp ,2}} < z_\text{cut} \left(\frac{\Delta R_{12}}{R}\right)^\beta \,,\) 
